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Recommended File Size for Ntbackup

Can I get some expert options on the recommended backup file (.bkf) size when using ntbackup?  I read one article to suggestion around 250GB.  What are your thoughts?  
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Alan Hardisty
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Recommended based on what?

If your backup needs 300Gb - it needs 300Gb.

Are you planning to restrict the amount of space you can use for a backup and if so, what if your backup exceeds this amount?  If you do that - it will fail.
I'd make them not larger than 4GB. That way you can copy them to a fat32 formated disk without running into the max file-size limit of fat32 (which is around 4GB). Apart from that, it would also fit onto a DVD if necessary. Other reasons for the small size is that if you get a small file-system or disk corruption that would probably make the complete file unusable, while if you have it in smaller chunks only one of those small chunks would be unusable, that would increase the chance of being able to restore at least some of the data.

I think those are also the reasons why other backup utilities split their backups files by default into chunks of around 4GB each.
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Sorry for not clarifying.  I am not wanting to split the file.  I have just read articles and posts that the probability of a ntbackup file getting corrupt goes way up when you start reaching 250GB mark.  If that is true then it would help convince the powers that be that a 3rd party solution is what they need.

We will probably will be on this 2003 server for several more years.
If you are referring to the following article:

http://www.windowsitpro.com/article/monitoring-and-analysis/10-tips-to-keep-your-microsoft-exchange-server-humming

Then that was written in 2008 so things may have changed since then.

Can't say I have come across this problem before, but then I don't use NTBackup to backup an entire server :)

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Thanks for the comments.  I am already looking into Acronis as it does seem to be used and trusted by a lot of people.